What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.

Caverject Vial (Alprostadil)


Caverject Vial (Alprostadil)

Prescription Required


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  • Product Details


    Caverject (alprostadil) is used to treat erectile dysfunction. Caverject should not be used in women or children. 

    Fact Table




    US DailyMed


    Not determined

    Legal status


    Chemical Name


    Elimination half-life

    5 to 10 minutes

    Dosage (Strength)

    10mcg, 20mcg, 40mcg





    Protein binding


    PubChem CID






    ATC code






    Routes of administration



    Carefully read the instructions that come with Caverject. Talk to your doctor or pharmacist about any questions or concerns that arise.

    Use Caverject as your doctor instructs you. Your first dose should be administered in your doctor's office. Your healthcare provider should teach you how to prepare and inject Caverject before you administer it for the first time. In addition, he or she will tell you how much you should inject and when.

    Do not use Caverject more than 3 times a week.

    Do not use Caverject more than one time every 24 hours.

    The injection site should be changed each time you use Caverject.

    Each Caverject should be used one time and appropriately disposed of after each injection.


    The active ingredient in Caverject is alprostadil. The inactive ingredients are alpha cyclodextrin, lactose, sodium citrate, and benzyl alcohol. Hydrochloric acid and/or sodium hydroxide is included to balance pH.


    Avoid the use of Caverject if you are allergic to alprostadil or any of the other ingredients contained in Caverject.

    Avoid the use of Caverject if you have health conditions that may cause you to have an erection for more than 4 hours. These conditions include sickle cell anemia, sickle cell trait, multiple myeloma, and leukemia.

    Avoid the use of Caverject if the shape of your penis is deformed.

    Avoid the use of Caverject if you have a penile implant.


    • Before you start using Caverject, be sure to tell your doctor about:
      • All the medications you take. These include prescription and over-the-counter medications as well as vitamins and herbal supplements. 
      • Your allergies.
      • Your medical history and current health problems.

    Side Effects

    Caverject side effects include an erection that lasts longer than 4 hours, deformed penis shape, low blood pressure, bleeding at the injection site, and benzyl alcohol toxicity. These are not all the side effects that can be caused by Caverject. Contact your doctor right away if you have side effects that are bothersome or persistent.


    1. Caverject (alprostadil) for injection, for intracavernosal use. New York, NY: Pharmacia and Upjohn Co; 2017.

    IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.

    Product Code : 9358

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